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United States Patent | 5,016,581 |
Parsons | May 21, 1991 |
A valve stem which is located for axial movement; a valve lever is pivotally mounted at one end and is attached adjacent the other end to the end of the valve stem, the valve lever defines a track; a drive pin engages in the track the drive pin being mounted at one end of a first link the other end of the link being pivotally mounted about a fixed pivot, a second link is pivotally mounted at one end about moveable pivot, the first and second links being interconnected by an intermediate link pivotally attached to said first and second links at positions separated from their pivots, a drive link is pivotally connected at one end to the pivotal connection between the second link and intermediate link and at the other end to a crank, so that rotation of the crank will cause the linkage to oscillate and the drive pin to perform a reciprocating motion along an arcuate path; the trank has a first portion which is engaged by the drive pin when the valve is closed and coincides with the arcuate path of the drive pin and a second portion which diverges from the path of the drive pin, so that engagement of the second portion by the drive pin will cause the valve lever to move opening and closing the valve; and means being provided for movement of the pivot to vary the timing and duration of opening of the valve.
Inventors: | Parsons; Bryan N. V. (Stoney Stanton, GB) |
Assignee: | Jaguar Cars Limited (GB) |
Appl. No.: | 578785 |
Filed: | September 6, 1990 |
Sep 08, 1989[GB] | 8920361 |
Current U.S. Class: | 123/90.25; 74/519; 74/559; 123/90.16; 123/90.39; 251/232 |
Intern'l Class: | F01L 001/30 |
Field of Search: | 123/90.15,90.16,90.22,90.23,90.24,90.25,90.26,90.39 251/279,232,233,234 74/519,559 |
1503384 | Jul., 1924 | Sewell | 123/90. |
1586188 | May., 1926 | Fisher | 123/90. |
2035166 | Mar., 1936 | Kimball | 251/234. |
2035222 | Mar., 1936 | Curtis | 123/90. |
2954017 | Sep., 1960 | Forstner | 123/90. |
3952995 | Apr., 1976 | Nagumo et al. | 251/232. |
4457268 | Jul., 1984 | Jones | 123/90. |
4570900 | Feb., 1986 | Lonardi et al. | 251/232. |
Foreign Patent Documents | |||
420032 | Nov., 1934 | GB. | |
0311282 | Sep., 1988 | EP. | |
520733 | Oct., 1938 | GB. |